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كلية العلوم
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Journal Article

Facile synthesis of hierarchical ZnS@ FeSe2 nanostructures as new energy-efficient cathode material for advanced asymmetric supercapacitors

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We have effectively synthesized ZnS, FeSe2, and their nanocomposite in this study using a straightforward and affordable solvothermal process. We also investigate for the first time their ideal electrochemical performance for supercapacitors. The ZnS and FeSe2 positive electrodes exhibit capacitances of 266.2 F g-1 and 294.3 F g-1, respectively, with fascinating nanostructures and morphology. Their respective nanocomposites, AZ-1, AZ-2, and AZ-3, deliver capacitances of 356.8, 444.4, and 326.1 F g-1 with significant rate performance in aqueous solution in three-electrode assembly. The lowest ESR and Rct values of AZ-2 electrodes, which improved conductivity and charge transport kinetics and created a synergistic effect between ZnS and FeSe2 electrodes, are responsible for their exceptional capacitative performance. We built an asymmetric supercapacitor (AZ-2/AC) with an optimal voltage of 1.6 V, which demonstrated great power density (6250 W kg-1) and energy density (33 Wh kg-1) with remarkable cycling stability (88.1%) in an aqueous electrolyte after 12,000 cycles. As a result, FeSe2-based nanocomposites are strong contenders for realizing high energy and power delivery for practical applications.

Publication Work Type
Publisher Name
Magazine \ Newspaper
Journal of Science: Advanced Materials and Devices
more of publication
by B. Kanthappa, J. G. Manjunatha, N. Hareesha, Ammar M. Tighezza, Munirah D. Albaqami, Mika Sillanpää
Published in:
Chemistry Europe

by Nambudumada S. Prinith, Dr. Jamballi G. Manjunatha, Dr. Munirah D. Albaqami, Dr. Ammar Mohamed Tighezza, Prof. Mika Sillanpää
Published in:
Chemistry Europe

by Hareesha Nagarajappa, Dr. Jamballi G. Manjunatha, Dr. Abdullah A. Al-Kahtani, Dr. Ammar M. Tighezza, Dr. Narges Ataollahi